I have yet to find a good application that handles “On Demand” mode relatively well. This app clocks down your processors when on battery to their lowest setting and kicks them back up once A/C power is restored. I have used other linux power mgmt tools but haven’t had a great experience. I have a system76 Pangolin and it’s pretty power hungry, it’s pretty much a mobile desktop and during the Natty / Oneiric releases of Ubuntu I was lucky to get 40 minutes on the beast. But that was because everything was running full power, After installing Jupiter and making some additional changes I managed to turn 40 minutes into 2 hours. Not bad eh?

Some of the additional changes I made involved the following:

Taking /var/log and completely mounting it to tmpfs. This way we are writing straight to memory, not needing to bother the disk constant reads/writes. Take note that this causes your logs to clear out at the end of every reboot/shutdown, but I’ve seen improvement.

Nice posting, it is really informative, specially for those people who have questions regarding the problem of their laptop batteries. keep up the good work. and I am still expecting for more interesting post.